Abstract

In this study, we report a simple and feasible approach to be capable of decorating MWCNT directly with Fe3O4 and ZnS. The crystalline phase, size and morphology of the formed conjugate structure (MWCNT-Fe3O4@ZnS) have been analyzed with XRD, TEM and FESEM. The TEM and FESEM observations showed that the outer diameter of decorated MWCNT was about 50nm and a length extended up to few ten microns. The results of FT-IR, Raman, and EDS measurements confirmed the presence of Fe3O4 and ZnS on the sidewall of MWCNT. Magnetic property measured by VSM revealed ferrimagnetic behavior of the formed nanocomposites (NCs) with a saturation magnetization of 43emu/g. The synthesized NCs exhibited luminescent properties with a red shifted broad emission peak centered at 495nm whose band-gap was estimated to be ∼4.2eV. Using Scherrer and Brus equations, the size of the loaded Fe3O4 and ZnS nanocrystals were estimated to be 40.5 and 3.05nm respectively. The synthesized NCs showed high photocatalytic activity in conjunction with a magnetically separable feature. Also, the NCs was exhibited recyclability along with retained photocatalytic activity in the degradation of Cr(VI) in wastewater under UV-illumination.

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